Always lowercase and strip e-mail addresses for gravatar URL computation

Review Request #9445 — Created Dec. 15, 2017 and submitted — Latest diff uploaded

Information

Djblets
release-1.0.x
f01c6bb...

Reviewers

We now always strip whitespace and lowercase e-mails inside
get_gravatar_url_for_email, instead of having the logic inside of
get_gravatar_url. This will ensure that e-mail hashes are always
generated correctly.

Ran unit tests.